【題目】用方框中所給單詞的適當(dāng)形式填空。每詞限用一次。

main invite natural twelve difficult


（1）I think wonders are better than man-made ones because they are more amazing.
（2）My birthday is coming, so my parents are preparing a party for me.
（3）Today people search for information on the Internet instead of paper books.
（4）As her parents were both to a meeting in the school, Linda was home alone.
（5） are not excuses that stop you making progress.

【答案】
（1）natural
（2）twelfth
（3）mainly
（4）invited
（5）Difficulties
【解析】main主要的； invite 邀請； natural 自然的； twelve 十二； difficult困難的。
⑴句意：我認(rèn)為自然奇觀比人造奇跡更好因?yàn)樗鼈兏由衿�。形容詞修飾名詞，故填natural。
⑵句意：我的12歲生日快到了，所以我父母正在為我準(zhǔn)備一個聚會。表達(dá)生日用序數(shù)詞，故填twelfth。
⑶句意：今天人們主要在網(wǎng)上而不是紙質(zhì)的書上尋找信息。修飾動詞，故填副詞mainly。
⑷句意：因?yàn)樗改付急谎埲W(xué)校參加會議，Linda一個人在家。根據(jù)were可知填過去分詞invited構(gòu)成被動語態(tài)。所以填invited。
⑸句意：困難不是阻止你取得進(jìn)步的借口。根據(jù)系動詞are可知用復(fù)數(shù)，故填Difficulties。

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