1 . There is no doubt __________the temperature goes down, metal ____________.

A．that...contacts

B．whether...contrasts

C．that when...contracts

D．when...contracts

2 . You must speak louder ________ you can be heard by all especially those seated at the back.

A．in order that

B．on condition that

C．so long as

D．in case

3 . —We have enough time? What about taking a bus?
—OK, ________ the buses are not crowded.

A．as though

B．as long as

C．in order that

D．in case

4 . If you are wrong, the project will surely fail, ______hard we try.

A．whatever	B．whichever
C．even though	D．no matter how

5 . The procedure appealed to the staff a lot________it was introduced to them in January.

A．since

B．until

C．when

D．though

6 . _________ we eat for breakfast has a great effect on our health, many students skip breakfast for various reasons.

A．Though

B．In spite of that

C．Despite what

D．Although what

7 . One of the earliest-known inventions is the bow and arrow, which is still used throughout the world today, 15, 000 years ________ it was first invented. （用适当的词填空）

8 . ______ you know who they are and what motivates them, think about the influencers in your organization.

A．Just as

B．Even though

C．In case

D．Now that

9 . Classic American apple and cherry varieties might be the first dishes ________ to mind ________ the word “pie” is mentioned.

A．to come, when	B．coming, provided that
C．that came, when	D．to come, on the grounds that

10 . ________ChatGPT, an advanced AI chatbot, can interact in a conversational way, it still struggles to be completely accurate with its responses.

A．Since

B．Unless

C．Once

D．Although