The starter (赛跑发令员) gave the() for the race to begin.
A. advice
B. signal
C. glow
D. attention
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Having()the bear in the woods for one week, the man was almost out of food.
A. caught
B. shot
C. trailed
D. seeking
Pipes made of plastic are now widely used in building as they are light and do not become ()in water.
A. ripe
B. instant
C. rotten
D. mature
Jessica()her father on the knee and asked him not to worry about his health.
A. patted
B. struck
C. stroked
D. paced
They were under the()that the company was doing well, but in fact it was in serious trouble.
A. conclusion
B. expression
C. enjoyment
D. illusion