He is _____ a young boy that he can’t go to school.
A. so
B. such
C. very
D. pretty
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____ he opened the window, a sparrow flew in.
A. Though
B. The moment
C. If
D. Unless
Bad habits, _____ formed, are difficult to give up.
A. and
B. once
C. but
D. or
---May I go now?---________ you've finished your work, you may go.
A. Now that
B. As soon as
C. As long as
D. Although
Never lose heart ______ difficulty you may meet with.
A. what
B. whatever
C. how
D. however