His wife _____ to Singapore a few times, and now she ____there for a meeting.
| A．has been…has been | B．has been…has gone |
| C．has gone...has gone | D．has gone… has been |
--Look! There is a lot of litter on the floor. Please ______.
--OK, we will.
| A．pick up them | B．pick them up |
| C．pick up it | D．pick it up |
Recycling means waste can be put to ______ and be brought back to life.
| A．danger | B．use | C．practice | D．advantages |
--Why don’t you get used to the life in Beijing?
-- ______ the crowded traffic ______ the high living cost. The only reason is the badly polluted air.
| A．Either…or | B．Neither, nor |
| C．Not only, but also | D．Both, and |
--What’s the result of killing the sharks?
--If the number of the sharks ______, the other ocean lives will be in danger as well.
| A．drop too little | B．drops too little |
| C．drop too low | D．drops too low |
If you want to understand a culture better, it is worth spending the time ______ about their costums.
| A．learning | B．to learn | C．learned | D．learn |