The first telegraph cable 1 under the sea 2 England and France in 1850． Cables a
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The first telegraph cable 1 under the sea 2 England and France in 1850． Cables are 3 thicker and heavier than telegraph wires． There are 4 reasons 5 this: one reason is that the salt water of the sea harms ordinary telegraph wires, and so they have to be 6 ; 7 is that, because electricity passes easily through water, wires have to be covered 8 electric signals 9 are passing through them from escaping and 10 in the sea; 11 third reason is 12 cables have to be very strong 13 they will break 14 they are being 15 16 the bottom of the sea from a ship 17 on the 18 ．
| 1．A．was laying | B．was lain | C．was laid | D．was lying | |
| 2．A．among | B．between | C．from | D．of | |
| 3．A．much more | B．much | C．many more | D．more | |
| 4．A．a number of C．a great amount of | B．the number of D．a good many of | |||
| 5．A．for | B．of | C．to | D．with | |
| 6．A．protected | B．prevented | C．prepared | D．produced | |
| 7．A．other | B．the other | C．second reason | D．another | |
| 8．A．to be prevented C．being prevented | B．to prevent D．to have prevented | |||
| 9．A．what | B．which | C．ofwhich | D．from which | |
| 10．A．to be prevented C．being prevented | B．to prevent D．to have prevented | |||
| 11．A．one | B．the | C．and | D．/ | |
| 12．A．because | B．why | C．that | D．what | |
| 13．A．but | B．so | C．then | D．or | |
| 14．A．while | B．during | C．since | D．for | |
| 15．A．lied | B．lay | C．lain | D．laid | |
| 16．A．along | B．upon | C．on | D．above | |
| 17．A．to sail C．sailing | B．having sailed D．that sailing | |||
| 18．A．cover | B．surface | C．outer | D．way to | |
试题答案
答案：C;B;B;A;A;A;D;B;B;A;B;C;D;A;D;A;C;B