Liu Xi is good at ______. A: unning B: un C: to run

isthe surface on which the wheels move. A: toe B: unning rail C: stock rail

Lisa is always ___________, she’s never in on Monday mornings. A: diving B: unning C: skiving D: working

A clock is an inappropriate gift because it reminds the recipient that time is ___________. A: valued B: unning out C: less important

Passengers should arrive 30 minutes before the train starts __________. A: oarding B: listening C: unning D: opening

isthe exiting track that turns away from the main route. A: diverging track B: straight track C: unning rail

A chart position enclosed by a square is a(n)___. A: fix B: estimated position C: dead reckoning position D: unning fix

You would be () a risk to let your child go to school by himself. A: omitting B: attaching C: affording D: unning

以下哪些词语属于长尾关键词？ A: unning shoes B: cell phone case C: Frozen Elsa Anna Trousers D: handbag

To increase the distance to the vessel ahead by reducing one's own speed means ___ . A: fall back B: keep low speed C: unning afte D: drop back