What I want to to teenagers is that being addicted to the Internet will to some extent do harm to both mental and physical health．
| A．get off | B．get through | C．get across | D．get down |
The laptop computer was here a moment ago, but I can’t put my hands ___it now.
| A．in | B．at | C．on | D． with |
I really like this song as it is often heard _________everywhere in China.
| A．singing | B．sung | C．having sung | D．to sing |
_______, the disease will produce a kind of poison that will kill the patient.
| A．If it untreated | B．If is untreated |
| C．If being untreated | D．If untreated |
—How long are you staying?
--I don’t know. _____
A. That’s OK. B Never mind.
C. It all depends. D. It doesn’t matter.
After the long journey, the three of them went back home, _________
| A．hungry and tiredly | B．hungry and tired |
| C．hungrily and tiredly | D．hungrily and tired |