Mrs. Smith has three sons, two _____ have gone to college.
| A．of them | B．of whom | C．of who | D．of which |
49. ____ and friends should be few but good. (prov.)
| A．Money | B．Jobs | C．Books | D．Interests |
50. John is on the bottle again. This sentence probably means _____.
| A．John is standing on a bottle now. | B．John is holding a bottle now. |
| C．John threw away a bottle. | D．John begins to drink wine again. |
51. --- Who is at the _____ of all this trouble.
--- I don’t know.
| A．base | B．bottom | C．reason | D．Cause |
52. I shall walk with you to the bottom of the road. The underlined part means ____.
| A．end | B．top | C．side | D．Base |
53. --- Please tell me how to work out this maths problem.
--- Use your ______ , then your find a way.
| A．heart | B．brains | C．hand | D．Mind |