The sale continues ___ the end of the month. A. since B. until C. by D. during Explanation: We use until for something that lasts up to a specific point.
I'll call you ___ the morning, not tonight. A. on B. at C. in D. during Explanation: We use "in" with broad time periods, such as the morning.
The fireworks started ___ the stroke of midnight. A. on B. in C. at D. by Explanation: The fixed time phrase is at the stroke of midnight.
We have been close friends ___ childhood. A. since B. from C. for D. in Explanation: We use since with the starting point of a continuing situation.
He worked abroad ___ nearly a decade. A. for B. since C. during D. in Explanation: We use for with a length of time.
She always wakes up early ___ weekdays. A. on B. at C. in D. for Explanation: We use on with weekdays.
The cheque is valid ___ 30 June. A. until B. by C. on D. during Explanation: We use "until" for something that holds up to a time.
The phones must remain switched off ___ the exam. A. during B. for C. since D. in Explanation: We use during for something happening within an event.
He was away ___ three months last year. A. since B. during C. in D. for Explanation: We use for to show how long something lasted.