Question

【題目】用方框中所給詞的適當(dāng)形式填空。

clean，build，plant，hand

【1】By the end of last year, another bridge _________ here.

【2】Your paper must _________ in as soon as the bell rings.

【3】We are glad to find that many trees ________ last years.

【4】Your bedroom should ________ every day.

Answer 1

【答案】

【1】had been built

【2】be handed

【3】were planted

【4】be cleaned

【解析】

【1】根據(jù)By the end of last year“截止到去年年底”，判斷句子時態(tài)為過去完成時，且bridge與build之間為被動關(guān)系，所以為had been built。

【2】hand in sth意為“交上……”，其被動式為sth be handed in，所以paper與hand in之間為被動關(guān)系，且在情態(tài)動詞must之后，所以使用系動詞原形be。

【3】由trees判斷使用動詞plant，且兩者為被動關(guān)系，且根據(jù)last years判斷使用過去時；由句子主語many trees確定系動詞為were。

【4】由bedroom確定動詞為clean，且為被動式；在情態(tài)動詞should之后應(yīng)使用系動詞原形be。