He hesitated for a moment before kicking the ball, otherwise he ______ a goal.
| A．had scored | B．scored | C．would score | D．would have scored |
When I try to understand _______ that prevents so many Americans from being as happy as one might expect, it seems to me that there are two causes.
| A．why it does | B．what it does | C．what it is | D．why it is |
The science of medicine, _______ progress has been very rapid lately, is perhaps the most important of all the sciences.
| A．to which | B．in which | C．Which | D．with which |
—Which day do you think is all right to our next meeting?
—You make _______,_______ day is all the same to me.
| A．one;one | B．it;any | C．that; some | D．this; another |
—Jack, what do you think of the new work?
—It's not bad. But the hours are too long.
—Oh, _______
| A．that's really serious. | B．how about that job? |
| C．you'll soon get used to it. | D．you do it again. |
_______ the meeting room,he found all the parents already _______ there.
| A．To enter; sitting | B．Stepping into;to seat |
| C．Entered; seat | D．Entering;seated |