---It’s very kind ____you_____ help me complete the difficult job.
--- You’re welcome.
A. to; for
B. for; of
C. of; to
There ______ a number of books on the bookshelf. And the number of the books ____ 50.
| A．are; are | B．are; is | C．is; is | D．is; are |
He his baby every day because his wife is very busy.
| A．puts on | B．wears | C．dresses | D．is in |
---_______ do you write to your e-friends? --- Almost twice a month.
| A．How long | B．How often | C．How far | D．How soon |
It is really crazy ________ Peter to let his ________ son swim alone in the river.
| A．for; 5 years old | B．of; 5 years old |
| C．for; 5-years-old | D．of; 5-year-old |
My father has a habit of jogging ___________ the river in front of my house for an hour in the morning.
| A．between | B．along | C．over | D．through |