I can never forget the days _____ we worked together and the days _____ we spent together.A. when; which B. which; when C. what; that D when; when
Parents are advised to put books __________ they are easily accessible to children .
Since 2012,when he __________,the soldier has been in the army.
He told me his story in private,__________ nobody else knew what had happened to him.
-- Sir,may I have two days off next week? -- __________ . You have two meetings to attend then.
It’s really __________ comfort to the professor that his son has been admitted to __________ Harvard University.