_______ is known to us all that the old scientist, for _______ life was hard in the past, still works hard in his eighties.
The two girls had been talking in ________ low voice all ________ time during the meeting, which upset the manager.
This theory is found to be in line with the experimental results. Which of the following is similar to the underlined words?
____ you are a high school student, you are responsible for what you do.Which of the following is WRONG?
Dust and dirt soon ____ if a house is not cleaned regularly.
I ____ that he get some professional advice.