1.____she was leaving home, it started to rain heavily.
A. Before B. After C. As D. If
2. He picked the phone____as soon as it rang.
A. in B. on C. up D. off
3. "Do you mind closing the window?"-"_____
A.No, I don't mind B. Please do C. Yes, I do. D. Of course
4. We paddle the_____slowly upstream.
A. ship B. canoe C. bus D. train
5._____type of white or gray stone containing calcium, used for building and making cement.
A. Slope B. Site C. Limestone D. sand