No one knows when the house was built , but it must be very old.
A.suddenly B.gradually C.exactly D.recently
It's such ________ amazing show that I want to watch it ________ second time.
A.a; a B./; the C.an; a D.the; am
Mr. Hu is my favorite P. E. teacher because he always gives us clear ________ in class.
A.encouragement B.instructions C.introductions D.invitations
— Our art festival will be on next month.
— That’s wonderful. Could you tell me ________?
A.if all our teachers joined us B.where is it held
C.who will give the performances D.that we should wear school uniforms
Beijing-Baotou high-speed railway ________ for several months. I have taken the train three times.
A.is open B.has opened C.has been open D.has been opened
—In the past three years, we have learned a lot from our teachers.
—They are great, so we will be forever thankful ________ them.
A.to B.for C.of D.with
