1．I can't c ________________on my work when I'm tired．

2．She pulled the drowning man from the water and gave him first a ______．

3．He ____________ to the public to protect the environment．（呼吁）

4．This heating system has an_____________ temperature control．（自动的）

5．Large q__________ of air-conditioners are sold because of the hot weather．

6．He was __________ as monitor of our class．（任命）

7．A foreign c________ is a journalist who goes to a foreign country to report on events there．

8．It is _________ not to flush a public toilet in Singapore．（不合法的）

9．They can’t _________ to buy a new car for his son．（支付得起）

10．The students are d____________ on his parents for support．