20．-Tom，I'm very sorry to say that I can't go to watch tonight's match with you，for I have to prepare for the coming exam．
-________ Have some fun!（ ）
-________ Have some fun!（ ）
| A． | It's a piece of cake! | B． | Don't be a wet blanket! | ||
| C． | I'm all ears． | D． | Don't pull my leg． |
19．-David has made great progress recently．
-________，and ________．（ ）
-________，and ________．（ ）
| A． | So he has；so you have | B． | So he has；so have you | ||
| C． | So has he；so have you | D． | So has he；so you have |
18．I'm afraid I can only make a small contribution this time．
．We really feel grateful for your assistance．（ ）
．We really feel grateful for your assistance．（ ）
| A． | Every little helps | |
| B． | The more，the better | |
| C． | It's better to give than to receive | |
| D． | The best things come in small packages |
17．When did you meet him？
It was two days ago _____ I was having a walk along the beach．（ ）
It was two days ago _____ I was having a walk along the beach．（ ）
| A． | when | B． | that | C． | where | D． | which |
16．______ maths can be difficult to learn，it is very useful to develop our thinking．（ ）
0 138753 138761 138767 138771 138777 138779 138783 138789 138791 138797 138803 138807 138809 138813 138819 138821 138827 138831 138833 138837 138839 138843 138845 138847 138848 138849 138851 138852 138853 138855 138857 138861 138863 138867 138869 138873 138879 138881 138887 138891 138893 138897 138903 138909 138911 138917 138921 138923 138929 138933 138939 138947 151629
| A． | While | B． | Since | C． | As | D． | For |