It seems that all the people ________ are interested in the ________ situation.[ ]

Radium salts, which have been found to _____ in bones, give rise to cancers of the bone.

computers areconvenient to us in daily life, it may also cause other problems.

It was in 1969 ___ the Americanastronauts first succeeded in landing on the moon

­—You look so youngHaven’t you graduated from your university?—Yes, I________in the English Department of Shandong University for four years