Joe has worked in the factory ________.

[　　]

A．since three weeks

B．three weeks ago

C．since three week ago

D．for three weeks

We ________ here two days ago. We ________ here for two days.

[　　]

A．have arrived, have been

B．arrived; were

C．arrived, have been

D．have arrived, were

Let's go to the country（乡下）tomorrow.

All right, if it ________ rain. 

[　　]

A． won't　　　　　 　B．isn't

C．doesn't　　　　　　 D．wouldn't

The bus has 　 　　 left. You have to go there on foot. 

[　　]

A． already　　　B．yet　　　C．ever　　　D．never

They have been on the farm 　　　　 last week. 

[　　]

A． since　　　B．for　　　C．from　　　D．in

Glasses can keep our eyes 　　　　. 　

[　　]

A．safely　　　B．to save　　　C．safe　　　D．save

The machines are 　　　　. They may hurt you. 

[　　]

A． danger　　　　　　B．dangerous

C． dangerously　　　　D． in danger

My house is about ten minutes 　　　　 bike. 

[　　]

A． by　　　B．in　　　C．on　　　D．with

I have 　　　　 things to tell you. 

[　　]

A． a little　　　B．few　　　C．a few　　　D．little

The workers 　　　　 wear glasses and thick clothes. 　　　

[　　]

A． all　　　B．both　　　C．either　　　D．neither