题目内容
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 |
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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 |
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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 |
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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 |
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18.A.cover | B.surface | C.outer | D.way to |
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