Samples：The approval samples must be sent to us within 7 days after the order is confirmed.

He sometimes employs students to （) samples of their products.

After having seen the（)and samples, Jenny makes the specific inquiry.

Representative samples （) taken by the inspector from the whole lot yesterday.A．wasB．isC

The graduate committee must be in full accord in their approval of a dissertation. The und

A．advantagesB．turnsC．actionsD．samples

In the United States, a proposal to make a change to the Constitution must first be approv