Could the sportsman lift those heavy weights?
...... ?

The famous mystery writer couldn't sell her last book.
The famous mystery writer ...... .

Jane's typist could write the letter in five minutes.
Jane's typist ...... .

Those secret agents could locate the missing gun.
Those secret agents ...... .

The Chinese workers could work in these terrible conditions.
The Chinese workers ...... .

Those reporters couldn't do their job properly.
Those reporters ...... .

The village doctor couldn't find out what was wrong with my son.
The village doctor ...... .

The Queen couldn't attend the meeting.
The Queen ...... .

Could the baker deliver the cakes on time?
...... ?

Could the paramedics save the man's life?
...... ?

The police dog couldn't find any traces of drugs in the last compartment.
The police dog ...... .

Pete couldn't win Lilly's love though he's never had such a huge crush on anyone before.
Pete ...... though he's never had such a huge crush on anyone before.