We have worked for two hours. Let's stop ________ a rest.
A.has B.to have C.had D.having
My parents and teachers always encourage me ________ what I like.
A.do B.did C.to do D.doing
Helen spent three hours ________ the task. She is tired now.
A.complete B.completing C.to complete D.completed
Although my grandma is in her seventies, she is willing ________ new things.
A.learn B.learning C.to learn D.learned
They were required ________ singing before the competition.
A.practice B.practicing C.to practice D.practiced
Can I borrow your bike? I promise ________ it on time.
A.return B.to return C.returning D.returned
