问题
tor is skilled at treating heart trouble and never accepts any gift from hispatients, so he has a very good_____
A:do put
B:in researching
C:to researching
D:at researching
B:in researching
C:to researching
D:at researching
正确答案是：
同类题型
Please do me a favor —_____ my friend Mr. Smith toYouth Theater at 7:30 tonight.
______ of the land in that area ______ covered with golden yellow flowers at this time of year.
He has read many books onhistory, so it’s for him lo answer thesequestions.
Do you feel like ______ out?– No, I’d rather we _______ a taxi.