Complete the gaps with the modal verb 'could' in the negative and the correct forms of the words in brackets. Use contracted forms of the negative in all the sentences given.
...... (The pilot / land) at the airport last night.
...... (Some of the soldiers / overcome) the enemy.
...... (Robert's shoemaker / repair) his shoes last night.
...... (The poet / write) any cheerful poems anymore.
...... (The watchmaker / find) anything wrong with the clock.
...... (The pharmacist / give) us the medicine at once.
...... (The author / finish) the book on time.
...... (Our flight attendants / make) the passenger feel comfortable on the flight last night.
...... (The burglar / escape) from the house before the police had arrived.
...... (The carpenter / deliver) the stools on time this month.
...... (The farmers / plant) those seeds this season.
...... (The coach / train) the footballers anymore.