____,the bus started at once.
A. The signal was given
B. The signal giving
C. The signal given
D. When the signal given
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______in this way, the situation doesn' t seem so disappointing.
A. To look
B. Looking at
C. Looked at
D. To be looked at
______Sunday,the library doesn' t open.
A. Being
B. There being
C. It being
D. Having been
There is a river in the valley,fresh flowers _________________.
A. is on the banks
B. were on the banks
C. being on the banks
D. on the banks
I used to sleep with the window _____.
A. opened
B. open
C. opening
D. to open