She is always thinking more of herself, seldom, ________, offering to help others.
A. if never B. if possible
C. if ever D. if any
---How often do you drop your e-pal a line?
---_______, but usually once a week.
A. It depends B. As usual
C. Generally speaking D. Have no idea
Our skin, if ______ to sunlight for a long time, can become darker.
A. exposes B. exposing
C. being exposed D. exposed
_______ he met with the difficulty did he realize the importance of our help.
A. Never until B. Even though
C. Until when D. Ever since
---How’s that? Who broke the glass?
---Well, it ______ me. I was doing my homework the whole evening.
A. hasn’t been B. wasn’t
C. weren’t D. hadn’t been
Don’t be discouraged. ______ things as they are and you will enjoy every day of your life.
A. Take B. To take C. Taking D. Taken
