When the thunderstorm washed away the new bridge over the stream, all their work of three months was ________ .

[单选题]He has been away from home _____three months ago.A.sinceB.forC.duringD.befo

[单选题]Over eight months the scientists tested 20 drugs, all with negative results. Finally they tested the anticonvulsant drug ethosuzimide. Researchers found that the drug extended the life span of roundworms from 16. 7 days to 19. 6 days, a 17 percent in

[单选题]Only when we hadfinished all the work _____that it was too late to take a b

[主观题]There is no bridge over the river， we have to cross it by _b__________．

[试题]H．er last three months of life before______(give)a final, lethal injection by his doctor were filmed and first shown on television last year.

[单选题]This S/C may be（）three months before its expiry.A . postponedB . prolongedC . expandedD . renewed

[单选题]They found the ______bridge when they went across the village.A． old stone ChineseB． Chinese old stoneC． old Chinese stoneD． Chinese stone old

[单选题][A] over [B] out [C] off [D] away

[单选题]When a bridge transmits an Ethernet frame, the Ethernet frame. has(75).(75)A． the broadcast address for the its source addressB． the bridge's LAN address for its destination addressC． the bridge's LAN address for its source addressD． none of the ab

[单选题]THE MASTER WHEN CALL TO THE BRIDGE AND TAKING OVER THE CONN. FROM THE OFFICER OF THE WATCH , SHOULD SAY（）.A .I NOW HAVE THE WATCH.B .I NOW HAVE THE CONN.C .YOU NOW HAVE THE WATCH.D .YOU NOW HAVE THE CONN.