One third of the country ______covered with trees and the majority of the citizens_______black people.

A. is; are　　　　　 B. is; is　　　　　 C. are; are　　　　 D. are; is

—Must you ?I ______you could stay for dinner with us.
A. think                               B. thought
C. have thought                        D. am thinking

You _____ be careful when you cross here — the traffic lights aren’t working.

   A. can                B. ought to        C. might         　 D. may

We will have discovered other places ______(适合居住).

A number of students _____from the south.

　 A. are　 B. is　 C. have　 D. has

There are v　　　　　 (各种各样的) kinds of theme parks all over the world.

Great changes have taken place in that school. It is no longer ____ it was 20 years ago, _____it was so poorly equipped.

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

The manager or his secretary ______ to give you an interview.
    A. is           B. are         C. was          D. were

The teacher found ____ difficult to decide ____ he would take with him to attend the conference.

　 A. it; whom　　　　 B. himself; who 　　　C. this; whom　　　 D. that; who

In April, 2009, President Hu inspected the warships in Qingdao,　 the 60th anniversary of the founding of the PLA Navy.

A. marking　 　　　　B. marked　 　　C. having marked　 　D. being marked