问题

You seem to have known Dr Smith for a long time.—- That’s true. ______ he joined our club six years ago.
A:Since
B:Until
C:When
D:Before
B:Until
C:When
D:Before
正确答案是:
同类题型
I will call you as soon as I _____ the ticket to the football match. [ ]
_____ do you exercise in a week?[ ]
I have to stay at home ______ school nights.[ ]
Have you ever come here before?— No. It is my first time that I to this city.
The letter_____Tommy received from his company yesterday is very important. [ ]