How ________ I help them to understand when they won’t listen to me?

can

would

may

must

So hard ________ that he can go to an ideal university．

studied Tom

did Tom study

does Tom studay

studies Tom

QQ, ________ you can chat with your friends, makes communication easy．

why

which

that

where

These tax laws which are intended for domestic companies do not ________ to foreign companies．

contribute

lead

apply

fit

The film is very humorous but ________ can be enjoyed unless you understand English culture．

everything

something

nothing

anything

－Your composition is full of mistakes．

－I wish I ________ more careful．

would have been

had been

would be

were

________ life began on the earth is one of the biggest puzzles to scientists．

How

What

Where

That

－Let’s throw a surprise party for mom’s 50^th birthday．

－That’s a good idea．We ________ several of her friends．

invite

have invited

are inviting

will invite

________ fit, we ought to learn more about our body and be careful with what we eat．

Keeping

To keep

Having kept．

To have kept

Mike must be angry with me, for he walked ________ me without even saying hello．

past

on

at

over