- It is not until recently ______ the scientists have found proof of there being water on Mars.A.whenB.thatC.howD.what
- He warmly congratulated them on _____ they had achieved in science and technology.A.thatB.whereC.whatD.which
- Students can easily fall behind in their studies ____ they don’t manage their spare time carefully.A.thoughB.ifC.s...
- _____ he is very busy, he spends at least two hours every day surfing the Internet in order to find out the latest de...
- ___ she will come or not depends on her mood. A.WhetherB.IfC.WhenD.That
- There is nothing ___ two chairs in the room.A.besideB.butC.except thatD.of
- Though Jim bought his wife a set of combs, ___ it was of no use.A.soB.butC./D.and
- We should try every effort to prevent violence from happening at school, ______ more and more students would drop out...
- — I phoned you at about three this afternoon, but no one answered.— Oh, that was probably _______ I was doing exercis...
- Do ________ you think is right _________ difficulties you may have.A.what; howeverB.that; whateverC.whatever; howe...
- 一 Do you mean we are almost running out of food?一 Yeah. the canned and frozen foods are used upA.as soon asB.as f...
- Hurry up, ____ you'll be late. A.orB.andC.soD.yet
- Do not make the same mistake ____ I did. A.soB.asC.likeD.that
- My sister is expecting me,____ I must be off now. A.howeverB.orC.soD.otherwise
- We should pay attention ____ to industry ____ to agriculture.A.either, orB.neither, norC.not, butD.both, and