________ all over the hills and around the lake are wild flowers of different kinds.
| A．To grow | B．Growing | C．Grown | D．Grow |
The message is very important, so it is supposed _______as soon as possible.
| A．to be sent | B．to send | C．being sent | D．sending |
He was _____ by his grandparents, so his parents seemed to be strangers to him.
| A．brought out | B．brought down | C．brought in | D．brought up |
Mr. Smith was thinking about how to explain to the manager why he was late for work, when a good idea ______ to him.
| A．happened | B．brought | C．occurred | D．struck |
___________ he has limited technical knowledge, the old worker has a lot of experience.
| A．Since | B．Unless | C．As | D．Although |
Your hand is dirty. It needs ____________.
| A．to wash | B．to be washing | C．being washed | D．washing |