The swimming pool is （） construction.

A:in the process of B:in the process for C:on the process of D:on the process for

Changes often happen in ______.

A:Initiating Process B:Executing Process C:Planning Process D:Closing Process

Changes often happen in （）．

A:initiating process B:Executing process C:Planning Process D:Closing Process

Changes often happen in （）.

A:Initiating Process B:Executing Process C:Planning Process D:Closing Process

Changes often happen in（）．

A:Initiating Process B:Executing Process C:Planning Process D:Closing Process

In a four stroke engine, which process lasts the longest period?

A:exhaust and suction process B:suction and compression process C:combustion and exhaust process D:working and exhaust process