Write down the phone number, __________ you’ll forget it.
A. so B. and C. but D. or
We can get fresh water from rain, from rivers, or from ________ the ground.
A. across B. under C. over D. off
They develop their skills _________ they can do things better and better.
A. however B. because C. since D. so that
He was late this morning, because the bus was too ________ for him to get on.
A. quiet B. tidy C. crowded D. noisy
—Which is the biggest number of the four?
— ．
A．One-third B．Two-thirds C．A half D．A quarter
What did Mr．Smith do before he came to China?
—He in a car factory．
A．worked B．works C．is working D．will work
