______ the police thought he was the most likely one, since they had no exact proof about it, they could not arrest him.

A. Although            B. As long as             C. If only   D. As soon as

I keep medicines on the top shelf, out of the children’s        .

A. reach       B. hand       C. hold       D. place

US President Barack Obama is expecting the economy to show some _________ of recovery．

A. attempts        B. signs       C. contents      D. waves

Hiking by oneself can be fun and good for health. It may also be good for ______ building.

A. respect       B. friendship        C. reputation        D. character

It is ___world of wonders, _____world where anything can happen.

A. a. the    B. a, a    C. the, a    D. /,/

– I hear that as many as 150 people were killed in the earthquake.

– Yes,_____ news came as ______ shock to us.

A. a; a            B. the; a         C. /; /           D. /; a

Shenzhou VII，           country’s third manned spaceship, was launched successfully on September 25, 2008 in            northwestern Gansu Province，China．

A. a；不填            B. the；the             C. the；不填          D. a；the

There was ______ time ______ I hated to go to school.

A. a; that B. a; when　　C. the; that D. the; when

In __________ film Cast Away. Tom Hanks plays __________ man named Chuck Noland.

A. a; the      B. the; a     C. the; the    D. a; a

We can never expect    bluer sky unless we create     less polluted world.

A. a; a                               B. a; the

C. the; a                             D. the; the