1.Not until the teacher explained the sentence two times ______ it.
a.that i under stand b.i didn't understand c.did i under stand d. had i understand
2.he used to_____in China, so we shall have something in common
A.living B.live C.lives D.lived
3.it would be nice if you _________then
A.could come B.had come C.could have come D.can some
4.if you want to invite someone for a meal at a restaurant,be_________"i'd like to take you to...".
A.certain B.explicit C.sure D.confident
5.weekend guests will be provided_______extra towels to make your stay more comfortable
A.for B.by C.to D.with
C B A B D 1.not until 置于句首要倒装2.used to do 过去常常做某事3.虚拟语气 这是对将来的虚拟，所以选A4.B 习惯用语be explicit about 对某事态度鲜明 5.给某人提供某物provide sb with sth或者,provide sth for sb...
