I did not go with him; he went there _____ himself[ ]

It’sunimB.mayC. can D.might

Jack took the boxes off the little table tomake _______ for the new computer.

We all had a lot of fun at the barbecueyesterday. Pity you weren’t there. —I really should have gone with you, but I________ on some remaining problems.

We can learn a lot Chinesehistory.