We’ll have to race the clock to complete the work on time

Helen, can I wear jeans and a T-shirt to the evening party—OK. But a dress might be .

(2013·河南开封四模)One more week, ________ we will accomplish the task better

Sometimes our opinions differ _______ what we choose to observe and how we deal with what we’ve observed

It was in 1990 ______ the medicine was tested on human patients.