影再也找不到了。"available"adj.有效的，可得到的。

　　2.-What should we pay more attention to if we go north in winter, Mum?

　　-Nothing much. Take warm clothes ________ case the weather is cold.

　　答案：in　"in case"以防，万一。答语第二句句意：带点厚衣服，以防天气很冷。

　　3. No bread eaten by man is so sweet as ________ earned by his own labour.

　　答案：that　句意：没有任何面包比自己劳动赚来的面包甜。that代替前面的bread。

　　4. After the doctor told her everything, Jenny was in ________ dilemma as to whether to tell her friends the truth about her condition or not.

　　答案：a　"in a dilemma"处于进退两难的处境。句意：医生告诉了她一切之后，珍妮处于是否要告诉她朋友真相的困境中。

　　5. Father ________ (leave) for London on business upon my arrival, so I didn't see him.

　　答案：had left　由"I didn't see him"可知父亲在我回来以前已经离开，动作发生在过去某个动作以前，故用过去完成时。

　　6. There are still many problems ________ (solve) before we are ready for a long stay on the Moon.

　　答案：to be solved'句意：在我们准备好在月球上长久停留之前，仍然还有许多问题有待解决。本题考查非谓语动词作定语。根据句意可知"这些问题还未解决"，to be solved既表被动又表示将来，故答案为to be solved。

　　7. Time ________ (permit), I will go there with you.

　　答案：permitting　句意：如果时间允许的话，我会和你一起去那里。"time permitting＝if time permits"如果时间允许的话。

8. The scientists are now ________ (explore) the question why the earth is becoming warmer and warmer.