_______homework did we have to do that we had no time to play basketball.
| A．So little | B．Too much | C．Too little | D．So much |
With he help of his friends, he has _________ a good business over the years.
| A．build up | B．made up | C．cut up | D．grown up |
"We can't go out to play football in this rainy weather," said Bob, ________ out of the window disappointed.
| A．look | B．to look | C．looked | D．looking |
The twins were so much alike; I could hardly ________ Tom.
| A．pick up | B．pick out | C．pick off | D．pick at |
By far, there are many problems ________ to be solved.
| A．remaining | B．remained | C．being remained | D．to remain |
I don't think _________ possible to master a foreign language without much memory work.
| A．this | B．that | C．its | D．it |