I’m sorry I delayed_________ your letter because I have been quite busy these days.
| A．to answer | B．to have answered |
| C．answering | D．answered |
I am really worried about his grades in the coming test because of the little use he ______ of his time.
| A．did | B．took | C．got | D．made |
I didn’t go outing on National Day because the bad weather ______ the difficulty.
| A．added up | B．added to | C．added up to | D．added |
______, a small advertisement held my attention, which read “Easy job. Good wages. No experience necessary.”
| A．Looking through the newspaper | B．While I was looking through the newspaper |
| C．To look through the newspaper | D．I was looking through the newspaper |
— I hope you can come to the dance next Saturday. — ______. .
| A．Sure, but I have to visit my grandpa. | B．I really can’t agree with you; I prefer science. |
| C．Not at all. I’ll be glad to. | D．Sorry, but I have to help Jane with her English. |
— The current international financial crisis is affecting most countries in the world.
— Would it be at least several years ______ everything returns to normal?
| A．when | B．that | C．since | D．before |