______ it have been the failure to pick up directions from the ground control that caused the air crash?
“Come with me. You will be all right.” He took Polly’s hand, “________ the step here.”
It gives me the chance to _______ the help that people give me when it’s sunny.
---John, have you gone over your lessons learnt this morning? ---Not yet. ---You should know _____.
Howard Carter is one of the best-known explorers the world _____.
_____the teacher couldn’t understand was _____ fewer and fewer students showed interest in his class.