Mrs Black doesn’t believe her son is able to design a digital camera, ______ ?
| A．doesn’t she | B．does she | C．is he | D．isn’t he |
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 |
50. The lazy boy got up very late and went to school in a hurry. When he arrived at school, he found that he had put his socks on _______.
| A．outside | B．inside out | C．side out | D．back out |