The doctor would allow him to go home________he remained in bed.

A．as though 　　　　　　　　B．for fear that

C．on conditio n that 　　　　　D．as far as

It was in the street ________ this little girl saw a great scientist named Einstein for the first time in her life.

1. A.
   where
2. B.
   on which
3. C.
   that
4. D.
   who

We do not allow ________ in the lecture hall, so you are not allowed ________ here．

1. A.
   smoking; to smoke
2. B.
   to smoke; smoking
3. C.
   smoking; smoking
4. D.
   to smoke; to smoke

There came a point in his life ______ he had to think seriously about his future．

1. A.
   what
2. B.
   that
3. C.
   when
4. D.
   which

Small sailboats can easily turn over in the water ________.

1. A.
   if not managed carefully
2. B.
   if are not managed carefully
3. C.
   unless not managed carefully
4. D.
   unless are not managed carefully