题目
1.Students__（can/must)finish their homework on time.its a rule 2.The train is leaving.I am
afraid I__(can/have to)go now.
3.Jessica is a good student.She__(usually/never) gets to school early
afraid I__(can/have to)go now.
3.Jessica is a good student.She__(usually/never) gets to school early
提问时间：2021-01-01
答案
1.Students_must_（can/must)finish their homework on time.its a rule
2.The train is leaving.I amafraid I_have to_(can/have to)go now.
3.Jessica is a good student.She_never_(usually/never) gets to school early
2.The train is leaving.I amafraid I_have to_(can/have to)go now.
3.Jessica is a good student.She_never_(usually/never) gets to school early
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