The reason ________ he refused to attend the meeting was that they didn't give him an invitation earlier．

how

which

why

because

It was in the street ________ I met Mary yesterday．

that

when

where

what

Generally speaking, when ________ according to the directions, the drug has no side effect．

taking

taken

to take

to be taken

As we all know, many Chinese words have come into English, ________ typhoon, tofu and kung fu．

for example

that is

such as

so as to

________ of the students who took part in the military training is 450．

A number

A lot

Lots

The number

Please tell me the way you thought of ________ the garden．

take care of

to take care of

taking care of

to take care

Do you have any difficulty ________?

on listening

to listening

for listening

in listening

They lived a hard life and were often made ________ for over ten hours a day．

work

to work

to working

worked

The policeman warned the drive ________ so carelessly．

never to drive

to never drive

to not drive

doesn't drive

Excuse me, but can you tell me ________?

where can I get to the library

where I can get to the library

how can I get to the library

how I can get to the library