Quiet student ____he may be,he talks a lot about his favourite sport after class.A if B as C since D when
The eruption of volcano __________ by an earthquake caused great damage.
It didn't seem ugly to me. _________________,I think it's rather beautiful.
Look at the trouble I am in! If only I __________ your advice.
The doctor did a lot to __________ the patient's fear __________ he would die of cancer.
They use computers to keep the traffic _________ smoothly.