The key _______ in the lock and the door opened.

Leave your key with your neighbor _______ you lock yourself out one day.

The key _______ in the lock and the door opened. A: knocked B: clicked C: struck D: hit

The lock on the front door was one which _______. A: needed a piece of wire to open it B: could he opened from inside without a key C: couldn’t be opened without a key D: used a knob instead of a key

Those books were normally kept under______ and key in the library.​​​ A: door B: window C: lock D: bolt

In _____, Fischer proposed a lock-and-key analogy for enzyme–substrate interactions.

A keyboard key, like Caps Lock, that turns a feature on or off is called a _______ key. A: power B: toggle C: function D: combination

Insulin acts like a to open up a cell so that the circulating glucose can get inside the cell. A: window B: key C: doo D: lock

事务T1符合两段锁封锁法的序列是（） A: LOCK S(A)...LOCKS S(B) ...UNLOCK (B) ... UNLOCK (A) B: LOCK S(A) UNLOCK (A) LOCK S(B) UNLOCK (A) C: LOCK S(B) LOCK X(A) UNLOCK (A) LOCK S(C) D: UNLOCK (A) UNLOCK (B) LOCK X(A) LOCK X(B)

Don’t forget to lock the door! ______ to lock the door!