He was obviously in some kind of trouble, but I didn't know how I could help him .
举一反三
- I didn't know why he looked angry when I patted him _______.
- I didn't know how to make an overseas call, so I asked an (operate)__________ to help me.
- The new staff didn’t know how to use the system _________ I explained it to him yesterday.
- Not until I wrote to him ______ that I was also in Americ A: had he knownB. he knewC. he didn't knowD. did he know
- “Why didn't you help him?” “I would have ___________ I didn't have the money.”