A new subway ________ in Changsha and it will be open to traffic when completed next year.

A. has built B. has been built

C. is building D. is being built

The last bus _________ two minutes before I arrived at the bus stop. What a pity!

A. left B. has left

C. was leaving D. had left

It was after he had read the requirements _______ Mr. Black realized the task was too difficult to be finished.

A. when B. that C. which D. what

I’d appreciate _______ if you could let me know in advance whether you will come or not.

A. it B. you C. one D. what

___________ seems hard to believe is that the bird the officer uses is the same bird often seen in public parks----the pigeons.

A. What B. Whatever

C. Which D. That

At school, some students are active, ______ some are shy, yet they can be good friends with one another.

A. while B. although C. since D. thus

Human beings are different from animals _________ they have languages.

A. where B. in that

C. in which D. for which

----That is ________ you spent your summer holiday, isn’t it?

---- That’s right.

A. where B. which C. what D. if

By improving reading skills, you can read faster and understand more of ______ you read.

A. that B. which C. what D. how

Mary is being punished by the teacher. That is _______ she broke the school rules.

A. why B. because of

C. the reason why D. because