People believe that the China Dream is not very difficult ________ so long as the whole nation works hard for it.
A.realizingB.to be realizing
C.realizedD.to realize
These diagrams are especially helpful when we have a concrete problem ________ at hand.
A.be solvedB.to solve
C.solvedD.being solved
At last, we found ourselves at the foot of a hill with trees providing shade and ________ down to eat our picnic lunch.
A.sittingB.having sat
C.to sitD.sat
Launched in March 2010, China Face has been a daily news feature ________ on a Chinese individual.
A.being focusedB.focusing
C.to be focusedD.to focus
We entered the café and sat down by the window, waiting ________.
A.to serve B.to be served
C.serving D.served
With so many exercises ________, the students are having a hard time.
A.finished B.finishing
C.to finish D.being finishing