—_______________—We have sent out leaflets to all residents, explaining what to do in an

We needn't__________. Everything turned _________all right in the end.

A: worry ... up

B: worry ... down

C: have worried ... out

D: have worried ... on

We shall ask for samples ______ and then we can make our decision.

A．to be sent

B．being sent

C．to sent

D．to have been sent

_ crowded orders, we have sold out all the goods scheduled for shipment within this year.

A．As a result of

B．In result of

C．With the result of

D．As result of

We can learn from the passage that

A．most newly marketed drugs have side-effects

B．established drugs have serious effects

C．any unexpected effect of new drug is worth reporting

D．full reports should be sent of all the effects of all drugs

A. The frame is dropped.

B. The frame is addressed with a broadcast MAC address and sent out all ports.

C. The frame is sent out all ports except the receiving port.

D. An ARP request is sent out all ports except the receiving port.

E. A destination unreachable message is sent back to the source address.

F. None of the above.

A、would have caught

B、would catch

C、could catch