Many cities in China, _______Beijing, have been deeply affected by dirtier air.

Luckily, the poor boy had enough money _____ he could buy a train ticket.

ree gift doesn’t look good—-________, madam, but if you want good quality, youhave to pay for it

It was in the lab ______ was newly built ______ they carried out the experiment.

whose ambition is to become a network engineer, was always ______from other boys by his programming ability.