________ my teacher helping me, I could easily finish the work today.

She was so upset by the accident that she couldn’t ________ to explain just what happened.[ ]

I don’t know what ________ of students inthat school is, but you can see there are _________ of bikes and e-bikesoutside the gate.

Mr. Wu arrived ______Shanghai ______ the afternoon of October 10th.

The ______ is _______ difficult to answer.