These shoes look very good. I wonder __________.
| A．how much cost they are | B．how much do they cost |
| C．how much they cost | D．how much are they cost |
John's success has nothing to do with good luck. It is years of hard work has made him what he is today.
| A．why | B．when | C．which | D．that |
Listen! Do you hear someone for help?
| A．calling | B．call | C．to call | D．called |
It rained heavily in the south，_______ serious flooding in several provinces.
| A．caused | B．having caused | C．causing | D．to cause |
Mrs. White showed her students some old maps ______ from the library.
| A．to borrow | B．to be borrowed | C．borrowed | D．borrowing |
Mark ______ have hurried. After driving at top speed, he arrived half an hour early.
| A．needn’t | B．wouldn’t | C．mustn’t | D．couldn’t |