—When did your brother begin to show his interest in medicine.—It was a Saturday _____ he noticed his classmate experimenting on a frog in the lab.
Cars do cause us some health problems—in fact far more serious _______ than mobile phones do.
Her mother was ill so she had to look after her________.
You’ll have to wait for one more week,________ the manager will be back from his trip.
She looks forward every spring to _______ the flower-lined garden.A. visitB. paying a visitC. walk inC. walking in
What a hard life they______! You should have helped them.