Sit down, please. You ______ be tired after standing for so long.
could
can
must
might
—did the cartoon book cost you? —Five dollars.
—Does your grandfather take exercise every day? —Yes. He always 30 minutes taking a walk after supper.
David has become a ________ young writer.
Jim has an hobby. He is in collecting coins and notes.
The teacher made us ________ the words three times.