Before he tried the drug－vaccine combination, Mr. Parker was kept alive through ______.A．s

It was the drug, not the disease, that killed him. He______alive today if he ______that dr

Jenny Edward divulged her intention of trying vaccination under a bond of secrecy because

He tried his best to remedy the terrible

What does the customer collect before he or she leaves?( ) A.The bagC.The pri

Before joining the army he spent a lot of time in the village ________ he belonged.A.

Hard ( ) he tried he was unable to meet the deadline for the term paper.