The Internet has become a very _____ learning tool.
D. reliable
C. fashionable
B. comfortable
A. valuable
Be careful when using electrical ________
B. experiment
C. experience
A. equipment
D. exercise
The laptop is not working because you ________ it yet.
A. haven't charged
C. hasn't charged
D. has charged
B. have charged
Many people do not support _________on animals.
C. experiences
B. laboratories
D. exercises
A. experiments
This device _________ people to communicate by using voice commands.
B. makes
A. allows
C. applies
D. lets
They _________ a new camera in the classroom to monitor the activities
C. displayed
B. applied
A. installed
D. charged
Dave _____Chinese for six years now. He likes it.
B. have studied
C. had studied
A. has studied
D. studied
The company ______ introduced a new kind of smartphone since 2019. It looks fantastic!
introduces
introduce
has just introduced
have just introduced
