After walking on the zigzag path to the mountain top for a few hours, the tourists gathered under trees ________ shade and ________ down to have a rest.
| A．provided; sit | B．providing; sitting |
| C．providing; sat | D．provided; sat |
—Is the letter from your mother?
—Yes.But she ________the letter herself，because she doesn’t even know one word.
| A．needn’t have written | B．can’t have written |
| C．might not have written | D．should not have written |
Vegetables are healthiest when eaten _______, as the vitamin is not cooked out of them.
| A．limited | B．raw | C．balanced | D．extra |
Don’t eat too much chocolate, or you can ________ weight quickly.
| A．put back | B．put away |
| C．put up | D．put on |
Dick is over sixty, but he looks young for his age. He is always full of ______.
| A．energy | B．power |
| C．strength | D．force |
—It is said that there ____ be a big disaster in the town in five years.
—Nobody ______ tell exactly what will happen in the future.
| A．may; can | B．may; may |
| C．should; may | D．can; should |