Our physics teacher told us that light ________ faster than sound.
#40111
A
travel
B
travels
C
is travelling
D
has travelled
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Today’s young people can’t live without smart phones. They keep their hands on the phones whenever they go, even while they_______meals.
#38858
A
had
B
will have
C
are having
D
were having
--- Where is your mother?--- She _______ to Sichuan on business. She has ______ there four times recently.
#41943
A
has gone, gone
B
has been, been
C
has gone, been
D
has been, gone