評論
打印
429.I think it is necessary for my 19-year-old son to have his own mobile phone,for I sometimes want to make sure if he ____ home for dinner.
A.come
B.comes
C.has come
D.will come
430.Ladies and gentlemen, please fasten your seat belts. The plane _____.
A.takes off
B.is taking off
C.has taken off
D.took off
