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10. That day Mr Smith got up late, so he ran as fast as he could _________ the early bus.

A. catch                   B. to catch  C. catching  D. caught

【分析】此題容易誤選A，認(rèn)為情態(tài)動(dòng)詞后只能接動(dòng)詞原形。但是，錯(cuò)了，正確的答案是B。其實(shí)情態(tài)動(dòng)詞 could 后本來有動(dòng)詞原形 run，只是被省略了，即此句的完整形式應(yīng)是 …so he ran as fast as he could run to catch the early bus，其中的不定式 to catch the early bus 為目的狀語(yǔ)。又如：

(1) My parents did what they could _________ my aunt and uncle.

A. help                     B. to help                  C. helping                 D. helped

(2) He read what he could _________ his knowledge.

A. widen                   B. to widen               C. widening              D. widened

以上兩題均選B，即選不定式，且此不定式為目的狀語(yǔ)。但是，同學(xué)們?nèi)魮?jù)此形成思維定勢(shì)，也會(huì)麻煩。為此，請(qǐng)?jiān)倏磧深}：

(1) He ran as fast as he could _________to catch the bus.

A. hope                    B. to hope                 C. hoping                  D. hoped

【分析】此題的最佳答案不是B，而是C，其中的現(xiàn)在分詞短語(yǔ) hoping to catch the bus 用作伴隨狀語(yǔ)，即一邊跑一邊在希望能趕上早班車。

(2) He spent every minute he could _________ foreign languages.

A. study                   B. to study                C. studying               D. studied

【分析】此題也應(yīng)選C，但是，它與上題選現(xiàn)在分詞 hoping 表伴隨有所不同，此題的 studying 其實(shí)與其前的動(dòng)詞 spend 有關(guān)，即此句中的 studying 為動(dòng)名詞，其前省略了介詞 in。注意spend 的句型：spend + 時(shí)間或金錢 + (in) doing sth。

11. _________ is known to everybody, the moon travels round the earth once every month.

A. It                        B. As                       C. That                    D. What

【分析】此題很容易誤選 A，認(rèn)為此處應(yīng)填一個(gè)形式主語(yǔ)，況且 It is (well) known to…也是一個(gè)常用句型，讀起來也很上口，其實(shí)選錯(cuò)了。同學(xué)們仔細(xì)想想看，假若選 A，空格處填一個(gè)形式主語(yǔ)(it)，那么其后就應(yīng)有一個(gè)真正的主語(yǔ)，而事實(shí)上沒有。但是若句中的逗號(hào)改成 that，則只能選 A，因?yàn)檫@樣一來，that 便成為一個(gè)引導(dǎo)主語(yǔ)從句的引導(dǎo)詞。此題的最佳答案是 B，as 引導(dǎo)的是一個(gè)非限制性定語(yǔ)從句，可置于主句前(常譯為“正如”)或主句后(常譯為“這一點(diǎn)”)，句意為“正如大家所知，月球每月繞地球轉(zhuǎn)一周”。

12. He is always really rude, _________ is why people tend to avoid him.

A. that                     B. it                         C. this                     D. which

【分析】此題容易誤選 A，因?yàn)?/FONT> that’s why…是一個(gè)常用結(jié)構(gòu)，同學(xué)們極易受此影響而選錯(cuò)，當(dāng)然若此句的空格前有連詞 and 或其前的逗號(hào)改為分號(hào)，則完全可選that（分別構(gòu)成并列句或兩個(gè)獨(dú)立的簡(jiǎn)單句）。此題的最佳答案是 D，句子后半部為一個(gè)非限制性定語(yǔ)從句，which 指 He is always really rude. 另外請(qǐng)比較以下兩題（注意連詞的有無）：