Answer:
Question 1 with 1 blank I have no doubt that Manuel (be) the best person to do the job. Question 2 with 1 blank The driver does not deny that (having) little experience on these roads. Question 3 with 1 blank Ricardo doubts that Mirella (say) always the whole truth. Question 4 with 1 blank I know it's true that we (must) take care of the environment. Question 5 with 1 blankLina is not sure that her friends (can) come to the party. Question 6 with 1 blankClaudia and Julio deny that you (want) to move to another neighborhood. Question 7 with 1 blank It is not likely that she (look for) a secretary job.