Both of his parents died of illness so he ______ support his family at the age o
题型：同步题难度：来源：
| Both of his parents died of illness so he ______ support his family at the age of 14. |
| [ ] |
A. must
B. should
C. could
D. had to |
答案
| D |
举一反三
| This book ______ be Peter"s. His is still in his bag. |
| [ ] |
A. may not
B. can"t
C. mustn"t
D. needn"t |
—It nearly took me an hour to walk there.
—Have a drink, please. You _____ be thirsty. |
| [ ] |
A. should
B. can
C. must
D. need |
| The last train has left, so I ______ stay here until tomorrow. |
[ ] |
A. must
B. have to
C. stop
D. live |
| I have to _____ for the math test. |
[ ] |
A. study
B. studying
C. learning
D. studied |
| He ______ Lily"s boyfriend. |
| [ ] |
A. maybe
B. can be
C. must be
D. be |
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