If we keep wasting so much energy, ________are that our oil wells will dry up and the environment will be destroyed.
A. problems B. difficulties C. questions D. chances
You may imagine what great difficulty I had ________ complicated ideas in simple English.
A．expressing B．to express C．expressed D．express
The incomes of skilled workers went up. ________，unskilled workers saw their earnings fall.
A. Moreover B. Therefore C. Meanwhile D. Otherwise
The further falling of the stock market as reported today has ________ a fresh wave of selling.
A．given off B．set off C．put off D．got off
I'm interested in a single room. Do you have any ________？
A．convenient B．available C．possible D．personal
I ________ on a sofa because my grandparents have been here to spend the weekend.
A. slept B. was sleeping C. have slept D. am sleeping
