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

正确答案是：

标签： dr , known , seem

同类题型

My father has worked there ___________.

Father’s Day is coming, I’m thinking about ______.

Tom often helps me ______ my English. [ ]

What are you looking for ? —-I’m looking for the pen ____my father gave me last week.

Today, there are still 40 _______ children needing help for education.