The students have kept working for two hours. Ask them
| The students have kept working for two hours. Ask them _____ a rest, please. |
| [ ] |
| A. have B. had C. having D. to have |
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你能帮帮他们吗
| The students have kept working for two hours. Ask them _____ a rest, please. |
| [ ] |
| A. have B. had C. having D. to have |
你能帮帮他们吗