________ is difficult if you put your heart into it.
The manager asked his secretary ________ the report before Friday.
finish
finishes
finishing
to finish
Michael and his friends practise ________ table tennis after school every day.
play
played
playing
to play
The headmaster is not available now. He ________ to the new teachers.
speaks
spoke
is speaking
was speaking
Last weekend, David ________ a visit to his grandparents in the countryside.
pays
paid
will pay
has paid
-________ I have two tickets for the Chinese Farmers' Painting Exhibition?
-Sorry. The tickets are sold out.
Must
Need
Should
May