He should________his attention________the main problems. [ ]A. aim; with B.
题型：同步题难度：来源：
| He should________his attention________the main problems. |
| [ ] |
A. aim; with
B. pay; on
C. focus; on
D. concentrate; with |
答案
| C |
举一反三
| He________live in the south, so it is hard for him to________the climate here. |
| [ ] |
A. was used to; be used to
B. used to; used to
C. was used to; get used to
D. used to; get used to |
— What has made you so happy, Mary?
— Oh, I"ve just________an old friend I haven"t seen for years. |
| [ ] |
A. come upon
B. come in
C. come out
D. come up |
| We lost our way in the street and the heavy rain________our helplessness. |
| [ ] |
A. added to
B. led to
C. turned out
D. made up |
| The clerk________his letter is working in our company. |
| [ ] |
A. referred
B. referred to
C. referred to in
D. referred in |
| To keep healthy，Professor Johnson ________ cycling as a regular form of exercise after he retired. |
| [ ] |
A．took up
B．caught on
C．carried out
D．made for |
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