He appears ______ a long time. He is impatient for my arrival.
#98566
A
to wait
B
to be waiting
C
to have waited
D
to have been waiting
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______to the sun for too long, I think, can hurt your skin.
#89714
A
Being exposed
B
To expose
C
Exposing
D
Exposed
He sent me an E-mail, _____ to get further information. 
#92831
A
hoped
B
hoping
C
to hope
D
hope
Stephen tried to get his wok______ in the medical circle.
#91413
A
to recognize
B
recognizing
C
recognize
D
recognized