A study shows that walking fast in your old age is a ________ that you will live a long life.

A．sign  B．mark  C．symbol  D．signal

With everything he had missing, he was ________ hopeless and killed himself.

A．hardly  B．luckily  C．sincerely  D．totally

Obviously, we can draw the conclusion that good manners________from politeness and respect for others.

A．happen  B．arise  C．keep  D．rise

With so many problems ________， Jack looks like a cat on a hot tin roof.

A．solved  B．to solve

C．solving  D．to be solved

—That's the third time he's won the award in this field.

—Yes. He ________ his maximum potential in the past decade.

A．explored  B．is exploring

C．has been exploring  D．has explored

—Do you think attending training courses is a great help when you look for a new job?

—Well，it all depends.________，it gives me a chance to try.

A．Somehow  B．Besides

C．Anyway  D．Therefore

With so many things ________， I have to work late into the night.

A．to deal with  B．dealt with

C．dealing with  D．being dealt with

—I think he is taking an active part in social work.

—I agree with you________．

A．in the way  B．on the way

C．by the way  D．in a way

They stood there and opened their eyes wide, ________ what was happening.

A．pulling over  B．watching over

C．getting over  D．going over

The girl had hardly rung the bell________the door was opened suddenly, and her friends rushed out to greet her.

A．before  B．until  C．as  D．since