—What were you doing when I rang you this morning?—I was occupied ______ the housework and kept my son occupied______ his homework.
It has not been decided ____ they will leave.
The accident is reported to have occurred __________ the first Sunday in February.
The trouble is ____ we can not find such an expert.
People may have different opinion about Karen, but I admire her. ______, she is a great musician.
I am sure ____ you said is true.