After visiting China, most of the foreign friends said they would never forget the time      _________they had spent in China.

After visiting China, most of the foreign friends said they would never forget the time    they had spent in China.

A．what         B．that          C．when          D．a(chǎn)t which

After visiting China, most of the foreign friends said they would never forget the time      they had spent in China.

A．that           B．what           C．when              D．a(chǎn)t which

After visiting China, most of the foreign friends said they would never forget the time      _________they had spent in China.

（   ）After visiting China, most of the foreign friends said they would never forget the time      _________they had spent in China.

A．what               B．that                 C．when               D．a(chǎn)t which

After visiting China，most of the foreign friends said they would never forget the time ________ they had spent in China.

After visiting China，most of the foreign friends said they would never forget the time ________ they had spent in China.

1. A.
   that
2. B.
   what
3. C.
   when
4. D.
   at which

 After visiting China，most of the foreign friends said they would never forget the time ________ they had spent in China.

A. that        B. what         C. when      D. at which