There are fewer and fewer tigers in India. The situation will continue ________ humans stop hunting them for their fur and bones.
A. unless B. if C. because D. since
—You don’t have to take a raincoat. It isn’t going to rain.
—Well， I am not sure. It ________ do.
A. must B. need C. may D. would
In order to improve our spoken English， we should make much in our pronunciation.
A. practice B. attention C. attraction D. progress
The woman looks beautiful and energetic. It’s hard to imagine she is in her ________.
A. sixteen B. sixtieth C. sixty D. sixties
It’s good manners to be ________ while watching the raising of our national flag.
A. happy B. serious C. kind D. generous
—Look at the sign! Smoking ________ here.
—I’m really sorry. I’ll stop right now.
A. isn’t allowing B. doesn’t allow
C. isn’ t allowed D. didn’t allow
