It was Cindy who（ ）the switch that opened the front gate.
A: flipped
B: flipping
C: flapping
D: flapped
A: flipped
B: flipping
C: flapping
D: flapped
举一反三
- It was Cindy who _____ the switch that opened the front gate. A: flip B: flips C: flipped D: flipping
- The bus stop is ________________ the gate. A: in the front of B: in front C: in front of D: at the front of
- She came in, ( ) the light on. A: flipping B: flips C: flipped D: flip
- A NAND gate can be considered as an AND gate followed by a NOT gate.
- Social status can be best reflected in the gate. Generally speaking, the gate is divided into six levels according to the social status of the host: Wangfu gate; Guangliang Gate; Jinzhu Gate; Manzi Gate, Ruyi Gate and Qiangyuanshi Gate. (）