__ he still paused uncertain, hebecame aware that the driver was looking closely in from the street at thisunusual scene.

Tom has played a lot of computer games recently—Yes，that might ________his failure in the mid-term examinations

Do remember to see a doctor tomorrow!—_________.

Recently our community has launched a campaign among all the residents , ____ we are called upon to do our little but to prevent the worsening environment.

Which is the smallest number of the four–________.