When walking down the street, I came across David, when I _____ for years.
A. didn’t see B. haven’t seen
C. hadn’t seen D. wouldn’t see
Some of the texts have too many new words and expressions _______ are hard for me.
A. which B. who
C. where D. what
---- The woman biologist stayed in Africa studying wild animals for 13 years before she returned.
---- Oh, dear! She _______ a lot of difficulties!
A. may go through B. might go through
C. ought to have gone through D. must have gone through
Jim will go on a trip to Sichuan, ________ his parents used to live.
A. where B. which
C. when D. that
______ makes the school proud is ______ more than 90% of the students have been admitted to universities.
A. what; because B. that; because
C. that; what D. what; that
_______ we all know, books are the source of knowledge.
A. What B. That
C. Which D. As
