Some insects the color of their surroundings to protect themselves.
| A．take in | B．take off |
| C．take on | D．take up |
Most children with healthy appetites are ready to eat almost anything that is offered and a child rarely dislikes food __________ it is badly cooked．
| A．if | B．until | C．that | D．unless |
— You ought to have called him yesterday ．
— Yes，I know I ________.
| A．ought to | B．have to | C．should have | D．must have |
______ no possibility ______he can win the game this time.
| A．There’s; that | B．There’s; whether | C．It’s; that | D．It’s; whether |
Though ________ experience, he soon got a higher pay by working hard.
| A．lacked | B．lacking of | C．lacking | D．lacked in |
Come and see me whenever _____.
| A．you are convenient | B．you will be convenient |
| C．it is convenient for you | D．it will be convenient for you |