以下不属于采用截流式合流制排水系统的城市雨水系统的组成的是 （)

What problem is mentioned？

A．Too much money has been wasted.

B．The amount figures do not match.

C．The company is canceling a payment.

D．A new request has to be made.

A.Right

B.Wrong

C.Not mentioned

A.Right

B.Wrong

C.Not mentioned

Before the first non-stop flight made in 1949, it ________ necessary for all planes to land for refueling.

A) would be B) has been

C) had been D) would have been

, it ________ necessary for all planes to land for refueling.

A) would be B) has been C) had been D) would have been

My father has been on the ______ in this factory for nearly 20 years.

A．paypacket

B．payoff

C．payroll

D．payment

A．Never there before has been

B．Never before there has been

C．Never before has there been

D．Never there has been before

The old worker has been on the ______ in this factory for nearly 20 years.

A．paypacket

B．payoff

C．payroll

D．payment

That factory ()()() nearly 50 years ago.

A、 has been built

B、 had built

C、 was built

D、 has built

The new product has been a commercial success in the USA

A．Right

B．Wrong

C．Not mentioned