—I counted sheep, I drank milk and I tried everything, but nothing helped.
—It seems you _____ too much recently. Try some sleeping pills.
| A．worked | B．work | C．had worked | D．have been working |
______ bears’ number has increased, their conflicts with local people have increased too.
| A．If | B．With | C．As | D．While |
Having mastered the technologies of manned spacecraft, China became the third country in the world ______ manned spaceflight independently.
| A．develop | B．to develop | C．developing | D．developed |
______ sweet, this type of flower sells the best in the market.
| A．Smelt | B．Being smelt | C．To smell | D．Smelling |
The most widely accepted theory about the beginning of drama is based on the concept ______ drama evolved from ritual.
| A．which | B．that | C．when | D．as |
The growing speed of a plant is influenced by a number of factors, ______ are beyond our control.
| A．most of them | B．most of what | C．most of which | D．most of that |