Smoke sensors warned us of the fire for the smoke _____ the alarm.
A. trigger off
B. trigger of
C. triggered off
D. triggerd of
The toilet doesn't flush, the shower head and washbasin faucet keep ______, and bathtub drain ______ as well.
A. dripping, is clogged
B. dripping, clogged
C. dripping, has clogged
D. dripping, has been clogged
Please take two ____ three times a day after meals.
A. tablet
B. tabltes
C. tablets
D. tablte
The hotel will hold a _____ this morning.
A. fire dilling
B. firing drill
C. firing drills
D. fire drill
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