Children's brains can't develop properly ________ they lack protein．

when

since

because

unless

A－May I take your order?

B－Yes, I'd like a cup of coffee, a hot dog and some salad．

What about you, Lisa?

C－________

Me too

Same again, please

It's all the same to you

The same to me．

The mistakes made by Chinese students are quite different from ________ were made by the Japanese students in English study．

that

which

what

those

In the traffic accident, his father came close to ________

be killed

being killed

kill

killing

Only when ________ possible to settle the problem．

does the chief editor come will it be

the chief editor comes will it be

has the chief editor come it will be

the chief editor comes it will be

If knowledge is power, ________ Sir Francis Bacon wrote in 1579, ________ perhaps creativity can be described as the ability to use that power．

what; and

as; then

which; and

that; then

I ________ the hobby of fishing as a child．

built up

set up

kept up

took up

Personally I think it is the sales manager, rather than the sales girls, ________ to blame．

is

that is

are

who are

－Will you be ________ this afternoon, John?

－It depends, I'm afraid I'll be called in by my manager．

suitable

available

accurate

convenient

The education of ________ young is always ________ hot and serious topic in the modern society．

the;/

/; the

the; a

a; the