He was walking along the sands ______ he saw a big footprint in the sand.
A. while B. as C. when D. after
In public places, we can often see ______ that tell us useful things, such as no parking, no smoking, etc.
A. symptoms B. signs C. systems D. signals
It ______ delicious, so the cake was eaten up and mother smiled.
A. was tasted B. tasted C. was tasting D. tastes
The boy is ______ computer games and stays in the Internet cafe all day and night.
A. interested in B. enthusiastic about C. crazy about D. surprised at
The government is trying to do something to ______ the employment rate so that more people have jobs.
A. add B. gain C. achieve D. increase
It is reported that the drivers who use mobile phones while driving are more ______ to have accidents.
A. probable B. possible C. perhaps D. likely
