这两题我不会1.-Where did Mr.Smith come here?-________nine o'clock yesterday morning.A.AtB.ForC.InD.On2.-Jack,will you be home ______to see the children before they go bed?-No,problem.A.on timeB.in time C.at timesD.at the same time

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这两题我不会
1.-Where did Mr.Smith come here?
-________nine o'clock yesterday morning.
A.At
B.For
C.In
D.On
2.-Jack,will you be home ______to see the children before they go bed?
-No,problem.
A.on time
B.in time
C.at times
D.at the same time

第一题 时间点前应该加at,for后一般是一个目的,就算是现在完成时,也应该是since nine o'clock yesterday morning.
第二题 in time是及时的意思,at the same time是在同一时间.由句意可知,是在孩子睡觉前及时到家,而不是和孩子睡觉同时回家,故选B
.