The work ____ be finished in such a short time .
The young mother mw her baby fall to the ground, ______ brought her heart to her mouth.
He has three brothers, ________ is a doctor.
He never reads anything _______ is not worth reading.
―When was the house built? ―It was built in 1949 _______ the PRC was founded.
________ is known to everybody, the moon travels round the earth once every month.