_______ the forest park is far away, a lot of tourists visit it every year.
A. AsB. When
C. Even thoughD. In case
There are still many problems ______ before we are ready for a long stay on the Moon.
A. solvingB. solved
C. being solvedD.to be solved
________ I have a word with you? It won’t take long.
A. CanB. Must
C. ShallD. Should
I borrow the book Sherlock Holmes from the library last week, ______ my classmates recommended to me..
A. whoB. which
C. when D. Where
Last night, there were millions of people _______ the opening ceremony live on TV.
A. watchB. to watch
C. watchedD. watching
__ carefully if any change occurs when doing experiments in the lab..
A. ObserveB. To observe
C. Observed D. Observing
