Some insects ______ the color of their surroundings to protect themselves.
| A．take in | B．take off | C．take on | D．take out |
If you do not feel well, you should not ____going to see the doctor. ?
| A．pick out | B．give off | C．put off | D．make out |
The period ____dance classes increases gradually from two or three hours a day to five or six.
| A．referred to | B．kept to | C．got to | D．given to |
Some eighty years ago three-quarters of American production ____family farms or from business employing fewer than six people.
| A．made from | B．kept from | C．got from | D．came from |
The college is planning to offer more English courses to ____the needs of beginners of English.
| A．meet with | B．meet | C．supply | D．satisfy with |
The folk song concert was so well ____that all the tickets had been sold out on the first day.
| A．accepted | B．recognized | C．received | D．promised |