Come over and Have a chat with me whenever ________．

you will be convienient

it will be convenient to you

you are convenient

it is convenient to you

We must apply what we have learned to our daily work because in no case ________ from practice．

should theory separate

should theory be separated

theory should separate

theory should be separated

Getting out of the crowded bus, ________

her cell phone was found missing

her cell phone was nowhere to be found

she found her cell phone missing

Her cell phone couldn't be found

Having been attacked by terrorists, ________．

doctors came to their rescue

the tall building collapsed

an emergency measure was taken

warnings were given to tourists

Victor apologized for ________ to inform me of the change in the plan．

his being not able

him not to be able

his not being able

him to be not able

________ the meeting himself gave them a great deal of encouragement．

The president will attend

The president to attend

The president attended

The president's attending

It was announced that only when the fire was under control ________ to return to their homes．

the residents would be permitted

had the residents been permitted

would be residents be permitted

the residents had been permitted

By the end of last month, we had produced ________ as we did last year．

as twice many cars

twice many as cars

twice as many cars

as many cars twice

It was so dark that he ________．

didn't dare to go out to fetch some water

not dared bring some water

dares to go out to bring some water

to dare to fetch some water

When you study the local map, you'll find this town is ________．

twice as a large town as that

twice the size of that one

twice as larger as that one

twice as larger a town as that