--- Where is Jack? I can’t find him anywhere.
--- He ______ his homework upstairs.
| A．might have done | B．must have done | C．might be doing | D．must do |
The field research will take Joan and Paul about five months; it will be a long time ________ we meet them again.
| A．after | B．before | C．since | D．when |
I just wonder ________ that makes him so excited.
| A．why it does | B．what he does | C．how it is | D．what it is |
By nine o’clock, all the Olympic torch bearers had reached the top of Mount Qomolangma, ________ appeared a rare rainbow soon.
| A．that | B．which | C．from which | D．above which |
— It’s burning hot today, isn’t it?
— Yes. ________ yesterday.
| A．So was it | B．So it was | C．So is it | D．So it is |
“Freeze, you guy! ________, and I’ll shoot you.” an old man with a gun in hand shouted at me.
| A．If you go for one more step | B．Going for one more step |
| C．One more step | D．You going for one more step |