3.We have explored or sent robot spaceships to the

We are sorry to have to complain of the quality of the shipment of wheat , but it is far （) the sample you sent us.

An expert, together with some assistants, have been sent to help us with the project.

Suppose we built a robot（机器人)to explore the planet Mars. We provide the robot

Having been caught on the spot, the American spy was sent to the General Lee.

Having been sent to the wrong address, the supplies ordered from the Acme Company did not

Polar explorers have to be extremely ______ to endure the abominable climate and other har