It is said that ________ wool product in Australia is of _________ high quality.
| A．/; / | B．the; / | C．the; a | D．the; the |
--- How many times have you been to China?
--- In fact, it is the first time that I ______ here.
| A．was | B．am | C．had been | D．have been |
Please ______ the numbers and I’m sure they will ______ more than 1, 000.
| A．add up; add to | B．add up; add up |
| C．add up; add up to | D．add to; add up |
The policemen had no ______ in finding the knife that the murderer had thrown.
| A．difficulty | B．troubles | C．problems | D．question |
An athlete can’t play balls well without severe ______.
| A．exercise | B．teach | C．education | D．training |
I ______ the time ______ so quickly.
| A．didn’t realize; had passed | B．don’t realize; passed |
| C．haven’t realized; passed | D．hadn’t realized; had passed |