The Great Wall, _____ to be the longest wall in the world, runs across China like a huge dragon．
A．saying B．to say C．said D．being said
It is widely believed among bioengineers _____ it will be possible to create life under laboratory conditions．
A．which B．what C．that D．when
Teaching ___ child to cook will improve many of ___ skills that he or she will need later in life．
A．/; the B．a; the C．a ; / D．the; a
—Rather than ___ on a crowded bus, he always prefers ___ a bicycle.
A. ride; to ride B. riding; ride C. ride; ride D. to ride; Riding
Kate didn’t come yesterday, or you ________ her.
A. would see B. were to see C. had seen D. might have seen
I walked in our garden, ________Tom and Jim were tying a big sign onto one of the trees.
A. which B. when C. where D. that
