The door [ 28 ] open however hard I tried.
c．wasn't able to
d．had better not
If Ken is taller than Bob, and Bob is taller than Sam, then Sam ( ) be taller than Ken.
We ( ) to hurry. There are still thirty minutes before the train leaves.
2．had better not
4．don't get used
I like spring, so I ( ) help but let out a sigh when the rainy season starts.
Sharing an office isn't easy. I'm used to ( ) my own space.
I'd ( ) stay here than go out.
1．rather 2．better 3．more 4．well
If you ( ) mind, please wait a few minutes for me to finish my work.
A：I saw Yong at Shinjuku Station this morning.
B：You [ ] have. She's still on vacation in Hawaii.
You had better ( ) at home.
(4) to stay
Ami ( ) forgotten her promise to me.
ア may have
イ must have
ウ may had
エ must had