The old church ___________the first century A.D. is well preserved.A. dates back to B. dated back toC. dating back to D. to date back to
Once out of the earth’s gravity, the astronaut is________ by the problem of weightlessness.
It took Mary quite a long time to ________ a new dress at the store.
—Would you like to go to the cinema with me tonight? — I’d like to, but it remains ________ whether I can finish my homework in time.
—Which of those T-shirts do you like most? —________ of them. They are both nice and comfortable to wear.
Traveling is ______, but we often feel ________ when we are back from travels.