The math problem is so hard. I really don’t know _____.
| A．what to do it | B．how to do |
| C．how to do it | D．what do it |
rise in carbon dioxide is causingsteady increase in global warming.
| A．不填; a | B．The; a | C．The;不填 | D．A；the |
–Would it bother you if I asked for your opinion on this report?
--______.
| A．No, I don’t | B．Yes, go ahead | C．Not at all | D．With pleasure |
–When has the country been united as one?
--______1998, I suppose.
| A．In | B．From | C．After | D．Since |
–Daddy, I’m anxious about the coming exam.
--Come on, boy. You’ve got to have confidence in yourself _____ you will make it.
| A．when | B．which | C．that | D．how |
–Great party, Yes?
---Oh, Jimmy. It’s you! ______, we last met more than 30 years ago.
| A．What’s more | B．That’s to say | C．Believe it or not | D．In other words |