During Dr Mar's last visit, he ________ on 150 patients on the ORBIS plane.
operates
is operating
will operate
operated
Sorry, I ________ a mistake. Let me correct it.
will make
am making
was making
have made
At this time yesterday, I ________ a science exam here.
take
was taking
am taking
will take
John is waiting for me. We ________ to the bookstore together.
went
have gone
will go
were going
—Do I have to hand in my report now?
—Of course, you ________. We’re going to discuss it.
can
can’t
must
mustn’t
________ you can use your dictionary, you will learn English better.
If
Unless
Though
Before