Tom wanted to play football with his friends in the street，but his father told him ________.

not to

not to do

not do it

do not to

考查動詞不定式的省略。完整的形式應(yīng)該是…，but his father told him not to play football with his friends in the street.為避免重復，常省去不定式動詞，保留不定式符號to，故選A。

Tom looks so pale today. He ______ ill.

must be

had to be

should be

shall be

[翻譯]湯姆看起來臉色不好，他一定生病了。[解析] A 試題解析：情態(tài)動詞must表示推測。題目中表示肯定的推測。

          no bus,we had to walk home.

There was

There being

Because there being

It being

考查獨立主格結(jié)構(gòu)。句意：沒有車，我不得不走路回家。根據(jù)句意，表示“存在”，要用there be 句型；分析句子可知，設(shè)空處應(yīng)用非謂語動詞，there be只有主動形式，故用現(xiàn)在分詞；因為非謂語動詞有自己獨立的的主語no bus,所以此處是獨立主格結(jié)構(gòu)。故選B項。

There's no simple solution          this problem.

of

for

to 

about

考查介詞。句意：這個問題沒有什么簡單的解決方法。此處是短語“

the solution to....的解決方法”，應(yīng)用介詞to。故選C項。

We’ll make the final decision on our scheme. ______ you change your mind, please inform us as soon as possible.

Should

Were

Would

Had

考查虛擬語氣的省略。句意：我們將對我們的計劃做最后決定。如果你改變主意，請盡快通知我們。根據(jù)語境，此處用虛擬語氣，表示與將來相反，從句用should+動詞原形，省略if，should提前，陳述句是：If you should change your mind……。故選A。

I drink a cup of coffee           ; but usually I take tea.

frequently

often

constantly

occasionally

考查副詞詞義辨析。句意：我偶爾喝一杯咖啡，但我通常喝茶。A. frequently頻繁地；B.often經(jīng)常地；C.constantly連續(xù)不斷地；D.occasionally偶爾地。but 表轉(zhuǎn)折關(guān)系；根據(jù)后半句的usually,前面用occasionally,與usually意思相對。故選D項。

Though ____ the dangers of smoking to their health, smokers still find it hard to give up smoking.

aware of

are aware of

be aware of

考查狀語從句的省略：句意：雖然很多經(jīng)常吸煙的人已經(jīng)意識到抽煙對他們健康造成了很嚴重的后果，但是他們?nèi)匀话l(fā)現(xiàn)很難戒煙。Though引導的讓步狀語從句是省略句，完整的句子是：though smokers are aware of the dangers of smoking to their health。當主從句的主語一致的時候，可以省略從句的主語和be動詞，選B