It was reported that many helicopters were sent there _________the missing passengers.
| A．in search of | B．in need of | C．in charge of | D．in time of |
55. The rock is _____ two hundred _____, and almost no one can move it.
| A．nearly; kilograms | B．mostly; kilograms |
| C．mostly; kilogram | D．nearly; kilogram |
54. It's very cold outside. You should put on more clothing to ______, otherwise you will catch bad cold.
| A．keep it out | B．make it out | C．keep out it | D．keep off it |
53. I’m afraid I can’t keep _______ my classmates as I’ve missed so many lessons. I have to ask my teacher for help.
| A．up | B．with | C．up with | D．on with |
52. _____ I went to the hospital to see Jack, who had _____ had an operation.
| A．Just now; just now | B．Just now; just | C．Just; just | D．Just; Just now |
51. They planned to go to Beijing for sightseeing, but because of their daughter’s unexpected illness they had to stay at home _____.
| A．instead | B．really | C．however | D．Though |